Visible Light Induced Photoelectrochemical Cathodic Protection for 304 SS by In2S3-sensitized ZnO Nanorod Array

The In2S3-sensitized ZnO nanorod array (NRA) composite was prepared using a two-step reaction method. The ZnO nanorod has a diameter of approximately 100 nm and In2S3 nanoparticles were grown on the ZnO NRA surface. The In2S3/ZnO NRA composite sintered at 400°C exhibits the best photoelectrochemical cathodic protection performance under visible light. The introducing of In2S3 into the In2S3/ZnO NRA composite results in the extension of the photoresponse of this composite to visible light, as well as the significant improvement of the separation efficiency of the photogenerated electrons and holes, and thus resulting in a dramatic increase of the photoelectrochemical cathodic protection performance of this composite.